<template>
    <div class="list" ref="wrapper">
        <div>
            <div class="area">
                <div class="title border-topbottom">当前城市</div>
                <div class="button-list">
                    <div class="button-wrap" @click="handleCityClick(currentCity)">
                        <div class="button">
                            <!-- {{this.$store.state.city}} -->
                            {{this.currentCity}}
                        </div>
                    </div>
                </div>
            </div>
            <div class="area">
                <div class="title border-topbottom">热门城市</div>
                <div class="button-list">
                    <div class="button-wrap" 
                            v-for="item of hot" 
                            :key="item.id"
                            @click="handleCityClick(item.name)"
                        >
                        <div class="button">{{item.name}}</div>
                    </div>
                </div>
            </div>
            <!-- 城市列表 -->
            <div class="area" 
                v-for="(item,key) of cities" 
                :key="key"
                :ref="key">
                <div class="title border-topbottom">{{key}}</div>
                <div class="item-list">
                    <div class="item border-bottom"
                        v-for="innerItem of item"
                        :key="innerItem.id"
                        @click="handleCityClick(innerItem.name)"
                    >
                        {{innerItem.name}}
                    </div>
                </div>
            </div>
        </div>
    </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations, mapActions } from 'vuex'
export default {
    name: 'CityList',
    props: {
        hot: Array,
        cities: Object,
        letter: String
    },
    computed: {
        ...mapState({
            currentCity: 'city'
        })
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.wrapper)
    },
    //监听器
    watch: {
        letter () {
            if (this.letter) {
                //获取一个数组
                const element = this.$refs[this.letter][0]
                // element: <div data-v-610a4ef1 class="area"></div>
                this.scroll.scrollToElement(element)
            }
        }
    },
    methods:{
        handleCityClick (city) {
            // this.$store.dispatch('changeCity',city)
            this.changeCity(city)
            this.$router.push('/')
        },
        //把vuex的方法映射到methods属性中
        ...mapActions(['changeCity'])
    }
}
</script>
<style lang="stylus" scoped>
    @import '~styles/varibles.styl'
    .border-topbottom
        &:before
            border-color #ccc
        &:after
            border-color #ccc
    .border-bottom
        &:before
            border-color #ccc
    .list
        overflow hidden
        position absolute
        top 1.58rem
        left 0
        right 0
        bottom 0
        .title
            line-height .54rem
            background #eee
            font-size .26rem
            padding-left .2rem
            color #666
        .button-list
            overflow hidden
            padding .1rem .6rem .1rem .1rem
            .button-wrap
                float left
                width 33.33%
                .button
                    margin .1rem
                    padding .1rem 0
                    text-align center
                    border .02rem solid #ccc
                    border-radius .06rem
        .item-list
            .item
                line-height .76rem
                color #666
                padding-left .2rem



</style>

